Stocks Remain Volatile: The stock market had another wild week as earnings reports and negative inflation news sparked big swings in the major indexes. For the week, the tech-heavy Nasdaq Composite Index was up 5%, leaving it down nearly 18% since Sept. 1 and off 31% since its March 10 high. The Dow Jones Industrial Average edged up 0.3% for the week and is now down 9% since Sept. 1 and nearly 13% from its Jan. 14 high.

Mixed Earnings News: Several companies beat earnings expectations for the third quarter,...